21022233442 has 32 divisors (see below), whose sum is σ = 36759225600. Its totient is φ = 8829632448.

The previous prime is 21022233433. The next prime is 21022233451. The reversal of 21022233442 is 24433222012.

It is an interprime number because it is at equal distance from previous prime (21022233433) and next prime (21022233451).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 666484 + ... + 697312.

It is an arithmetic number, because the mean of its divisors is an integer number (1148725800).

Almost surely, 2^21022233442 is an apocalyptic number.

21022233442 is a deficient number, since it is larger than the sum of its proper divisors (15736992158).

21022233442 is a wasteful number, since it uses less digits than its factorization.

21022233442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31810.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 21022233442 its reverse (24433222012), we get a palindrome (45455455454).

The spelling of 21022233442 in words is "twenty-one billion, twenty-two million, two hundred thirty-three thousand, four hundred forty-two".